Small: Age 3-4 Height: 98-104cm. Chest: up to 56cm. Waist: up to 52cm.Medium: Age 5-6 Height:110-116cm. Chest: up to 58cm. Waist: up to 55cm.Large: Age 7-8 Height: 122-128cm. Chest: up to 62cm. Waist: up to 56cm.